Draw-off mechanism for looms



M. lP. nu PRAY. DRAW-OFF MECHANISM FOR LOOMS. APPLICATION FILED SEPT. 14. |917.

Patented Nov. 9, 1920.

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DRAW-OFF MECHANISM FOR LOOMS.

APPLICATION man SEPT. r4, |917.

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DRAW-OFF MECHANISM FOR LOOMS.

APPLICATION FILED SEPT. I4. |917.

Patented Nov. 9, 1920.

3 SHEETS-SHEET 3.

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UNITED STATES PATENT orricr..

MAGLOIS P. DUVPBAY, OF TRENTON, NEW JERSEY.

DRAW-OFF lVIEiGl-IANISM FOR LOOMS.

Specification of Letters Patent.

Patented Nov. 9, 1920.

Application filed September 141:,` 1917. Serial No. 191,340.

the other, and each rollfprovided with mech- ,i

anism for `penetrating the fabric and'with means for withdrawing the penetrating mechanism from the` fabric; and it also comprises certain combination of parts and details in draw-off or woven fabric take-up mechanism; all as more fully hereinafter set forth and as claimed. j

The drawolf mechanism is particularly useful in combination with circular looms weaving multi-ply circular fabric in accordance with the process and apparatus described and claimed in:f my copendinp' application Serial Number 72,152, filed f anuary 14, 1916. In the said copending application 1 have described and claimed a process of weaving` multi-ply tubular fabrics which comprises preliminarily weaving one ply around a weaving surface, advancing that ply to another weaving surface and weaving a second ply upon the first ply, and mechanism which comprises two weaving surfaces, means for preliminarily weaving .one ply of tubular fabric around one weaving surface, means for advancing that ply to the other weaving surface and means for weaving the first ply upon the second ply at the second weaving surface. Details of the means for advancing one ply from the first weaving surface to the second weaving surface vare specifically the subject of this application. Y

While the draw-oif mechanism or the woven fabric take-up of this application is useful in connection with circular looms weaving one ply of fabric, it is particularly advantageous in use with the loom described and claimed in my said copending application when used for making multi-ply fabric.

In weaving multi-ply tubular fabric it is necessary to simultaneouslyv advance both plies from the first weaving surface to the second and to accomplish this I provide my draw-off mechanism or kwoven fabric talrel up with a plurality of pins which are posi tively and gradually projected. from `the surfaces of the rolls and which are advan tageously of a lengthsuiiicient to penetrate the first ply of fabric and to engage the second or inner ply. rlhese pins are normally held in retracted position.V by means of springsor equivalentdevicesbut may be positively` withdrawn from thefabric as the' rolls revolve.v .i V

'In the accompanying drawings showing a specific embodiment of the invention,

' Figure 1 is a segmental front elevation showing the mechanical and manual meansv for operating the draw-0E mechanism;

vFig.` 2 is a top plan view, the outline of the loom being in dotted lines; I ,j

Fig. 3 is a transverse section through the rolls on an `enlarged scale;

Fig. l is fa segmental top plan view of the roll partlyin section; .11.

Fig. 51s a detail in perspective of one of the take-up roll grip or pin bars; and

Fig. 6 is a sectional detail of the drive and `release mechanism.

Referring to the drawings, the main shaft l for driving' the loom is provided with a friction wheel 2 having a `band 3 of leather or similar material. The friction wheel is splined upon the shaft and is provided with a collar 4; having `a recessed portion 5 adapted to be engaged by the pin 6 carried by arm 7 in screw-threaded engagement withthe screw 8. This arrangement permits adjustment of the wheel 2 upon the shaft and controls the speed of rotation of the take-up rolls as will more fully herein-V after appear. The friction wheel 2 is normally in engagement with the driven ydisk 9 which is carried by by the vertical shaft 10 supported by the upright A of the loom. The driven disk 9A is normally springpressed against the friction wheel 2 by means of the spring l2, and is keyed to the shaft 10 to rotate therewith by means of a feather ll permitting vertical movement. ,The disk is provided with a groovedcollar 13 which is embraced by the lever 14 pivoted at 15 to the upright A. Rod 16 is in engagement with this lever and is provided at its top with a strap 17 in engagement with the eccentric 18 carried by the hand lever `19 suitably .journaled onarm 20 carried by sleeve 21 in engagement with the upright A, The rod 16 may be adjusted by means of the screw threads 22 and nut 23. Normally the friction wheel 2 drives the driven disk 9 at a rate of speed determined by the position of the driving wheel upon the main shaft. l/Vhen it is desired to disengage the driving and driven wheels the hand lever 19 is thrown downwardly, `thus liftthe gears 29 and 30 respectively, and these ,gears drive shafts y31 and V32 on which lare *keyed Vgears 133 and 34v which mesh vwith two spurs one of which 36) is shown, Fig. V'4. These Vlast vmentioned spurs drive the shafts 37 and 38 operating 'the draw-olf rolls. Adjacent the shaft 26 and preferably held :at an angle thereto by means ofthe knuckle joint 39 `is a shaft 40 normally in rotation. The vshaft 41 `may be placed engagement with shaft 40 through the Vclutch mechanism 42 operated by the .lever 43 and held inposition by ratchet 44. Shaft 41 carries manually operated handwheel 45. The shafts 40 and 41 are held at an'angle to shaft 26 to permit room for the warp tensloning or evening rolls shown indotted linesat 46. The handwheel is adapted to be locked to the shaft 40 `to initially draw off the woven fabric, or to be released therefrom, when the woven Vfabric mechanism will "be constantly driven from the main shaft. Y

The take-up for the woven 'fabric' comprises two rolls 50 and 51, the latter being free to revolve in journal boxes 52 whilethe former is free to revolve in journal boxes 53.

VThe `roll 50 is forced toward roll 51 through the pressure of the spring 54 having pres-y sure adjustment at the rear through set screw 55 bearing on the shouldered washer 56. 'Rolls 50 and 51 are providedon their peripheries with a plurality of longitudinal slots V57housing gripping pin Ybars 58. The pins 59 advantageously integral with these bars are of `sullicient length to Apenetrate the outer ply of fabricy and to engage the inner ply vat least to some extent whereby, as the rolls rotate, these pins pull the fabric from the weaving pinand maintain an even tension on both plies. The pins should lbe of as small diameter as is consistent with the requisite strength in order that they may not injuriously affect the fabric. Since the pins are operated in a radial direction there might be a tendency to tear the fabric and therefore, vin order to overcome this,

the bars 58 carrying the pins are normally held below the surface of the rolls by small springs 60 placed between the depressions 'happen if the `or off-set portions 61 in the bars and the bands 62 surrounding the rolls at either end. These, offeset portions of the bars formed by the depressions 61 serve as guiding means operating inengagement with shoulders 63 in the roller grooves 64. These bars 58 are advantageously provided on Yeither side with roller bearings 65 which engage cam plates 66 integral with the boxes 52 and 53. The cams 67 on the cam plates 66 serve to force the pin bars outwardly from the rolls and to push the pin into the fabric ljust at the point of nearest approach of the peripheries of the roller, thus preventing crowding of the fabric between the pins, which would pins werelixed unyiel'dingly in `the rolls. Ordinarily the4 springs 60 will serve to withdraw thepins from the fabric, but in order that there may be positive means for accomplishing this I place the guide plates 68 in position to engage 'the roller bearings 65 and force the bars "back into'thefslots.- Set screw 69 serves 'for adjustment -of roll 511while roll 50 is yieldingly lheld in position through the screw and spring, 55*54,r arrangement described.

What 'I claim is `1. rllhe combination with a circular loom having af weaving pin7 of a pair of adjacent rolls positioned with their approaching faces in substantial alinement with vthe weaving pin but spaced sufficiently far apart to permit thefabric from the'weaving pin to pass between them, means for rotating the said rolls in a direction away from the 'outwardly from the rolls as opposite pairs of the bars approach each other due to the rotation of the rolls. Y

2. The combination with a circular loom having a weaving pin,"of.a pair of adjacent rolls positioned with their approaching faces in substantial alinement with the weaving pin but spaced suiliciently far apart to permit the fabric from the weaving pin to pass between them, means for rotating the said rolls in a direction away from the weaving pin, bars on thefaces of the rolls adapted to be pressed against `the fabric, means for resisting outward movement of said bars, means for forcing saidbars outwardly from the rolls as opposite pairs of said `bars approach each other due to jthe rotation of the rolls, and additional Vmeans for positively'withdrawing the bars as they recede from each other 'due to the rotation of therolls. j

` 3. The combination with a circular loom having a weaving pin, of a pair of adjacent rolls positioned. with their approaching faces in substantial alinement with the weaving pin but spaced sufficiently far apart weaving pin, bars provided with: gripping pins on the faces ofthe rolls adapted to be -pressed against the fabric, means for resisting outward movement of `said bars, and means for forcing said bars 'outwardly from the rolls as opposite pairs of the bars approach eachother due to the rotation of the rolls.

if. The combination with a circular loom having a weaving pin, of a pair of adjacent rolls positioned with their approaching faces in substantial alinement with the Weaving pin but spaced suiiiciently far apart to permit the fabric from the weaving pin to pass between them, means for rotating the said rolls in a direction away from the weaving pin, bars provided with gripping pins on the faces of the rolls adapted to be pressed against the fabric9 means for resisting outward ymovement of said bars, means for forcing said bars outwardly from the rolls as opposite pairs of said bars approach each other due to the rotation of the rolls, and additional means for positively withdrawing the bars as they recede from each other due to the rotation of the rolls.

5. The combination with a'circular loom having a weaving pin, of a pair of adjacent rolls positioned with their approaching faces in substantial alinement with the weaving pin but spaced suficiently far apart to permit the fabric from the weaving pin to pass between them, recesses in said rolls gripping bars arranged in said recesses and adapted to be pressed against the fabric,

means for resisting outward movement of said bars, means for rotating said rolls in a direction away from the weaving pin, and means for forcing said bars outwardly from the rolls as the opposite pairs of the bars approach each other due to the rotation of the rolls.

6. The combination with a circular loom having a weaving pin, of a pair of adjacent rolls positioned with their approaching faces in substantial alinement with the weaving pin but spaced sufficiently far apart to permit the fabric from the weaving pin to pass between them, recesses in said rolls` gripping hars provided with pins and arranged in said recesses and adapted to be pressed against the fabric, means for resisting outward movement of said bars, means for rotating said rolls in a direction away from the weaving pin, and means for forcing said bars outwardly from the rolls as the opposite pairs of the bars approach each other due to the rotation of the rolls.

7 1n a take-up device for circular looms the combination of a pair of rolls each provided with longitudinal slots, springs', in said slots, bars in said slots normally retracted .tively retract said bars.

'toward the-center of the rolls by said springs., means adjacent the rolls for engaging thefsaid extremities of the bars `and over which the said extremities ride, projections onsaid means at the points ofnearestr approach of the :peripheries of the said rolls adapted `to force the said bars outwardly whereby they engage the fabric, and means in addition tothe said springs to posi- 8. In a take-up device for circular looms,

` the combination of a pair of rolls each provided with longitudinal slots, springs in said slot, bars in said slots normally retracted toward the center of the rolls by said springs, means adjacent the rolls for engaging the exremities of the bars and over which the said extremities ride7 projections on said means at the points of nearest approach of the peripheries of the said rolls adapted to force the said bars outwardly whereby they engage the fabric, and means comprising springs located at the extremities of each roll adapted to engage the extremities of the said bars and to positively force the bars back into their recesses.

9. A take-up device for looms, a pair of rolls provided with means on their peripheries for engaging the fabric, means to rotate the rolls, means for changing the speed of rotation of the rolls and means for throwing the speed changing means out of operation.

10. A take-up device for looms comprising a pair of rolls provided with slots on their peripheries, bars located in the slots, depressions at either end of the bars, springs located in said depressions, bands engaging the extremities of the springs whereby they normally tend to depress the bars in said slots, means on the bars for engaging bar operating means, and bar operating means arranged to force the bars outwardly against the tension of said springs when the rolls have revolved to predetermined points.

l1. A take-up device for looms compris-` ing ak pair of rolls provided with slots on their peripheries, bars located in the slots, depressions at either end of the bars, springs located in said depressions, bands engaging the extremities of the springs whereby they normally tend to depress the'bars in said slots, means onthe bars for engaging bar and bands .and fnormally forcing the bars land bands and 'normallyfforoingfthebars Avi:nwardly,and means ffor :engaging the-outer inwardly, means ion the outer ends :of the lends of the bars to force the Same outwardly Vbarsfor engagingbar operating means, and yagainst the ltension of. the springs. bar ioperatingrmeans :arranged yto lforce-the y 5 13. A take up deviceior looms compris- `lloars y'outwardly against the tension Vof the 15V ing a pair'o'f. rolls provided with slots on fsaidisprings When the irolls havelreyolved'to tlieil.1 periphery, bars .located in @said slots predetermined points.'y Y and carrying outwardly extending pins, Intestimony whereofaixfmysignature bands surrounding the outer ends of vthe f l Y Y 10 bars, springs interposed Abetween the bars 2MAGLOIS P. `DU PRAY;v 

